Re: [PATCH v14] exec: Fix dead-lock in de_thread with ptrace_attach

[Oleg Nesterov]

I'll try to read your email later, just one note for now...

On 01/22, Bernd Edlinger wrote:
>
> > I didn't say that t is a group leader. I said it can be a zombie sub-thread
> > with ->exit_state != 0.
>
> the condition here is
>
> (t != tsk->group_leader || !t->exit_state)
>
> so in other words, if t is a sub-thread, i.e. t != tsk->group_leader
> then the t->exit_state does not count,

Ah indeed, somehow I misread this check as if you skip the sub-threads
with ->exit_state != 0.

Sorry for noise.

Oleg.